Figure 1. Frequency responses of Serial SAWR sensor: (a) to 1×106 cells/ml; (b) to 5×105 cells/ml; (c) to 2.5×105 cells/ml; (d) to 1.25×105 cells/ml; (e) to 1×105 cells/ml; (f) mean frequency as function of cell concentration.
Figure 2. SAWR device and CSPE: (a) SAWR and CSPE; (b) SEM image of CSPE; (c) cyclic voltammetry of CSPE.
Figure 3. The testing system: (a) modified CSPE; (b) equivalent circuit of SAWR in serial with CSPE; (c) schematic diagram of detecting system.
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